Yajra issue after install in laravel

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1php artisan vendor:publish --provider=Yajra\DataTables\DataTablesServiceProvider

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1public function fetchUsers(){
2
3    # users list
4    $Users = User::where('status', 'Y')->get();
5    
6    return DataTables::of($Users)
7    ->editColumn('created_at', function ($Users)
8    {
9        
10        $date = date("Y-m-d", strtotime($Users->created_at));
11        return $date;
12
13    })->addColumn('update', function ($Users)
14    {
15        return $return = '<a class="btn btn-primary" href="'. url('admin/update-user').'/'.encrypt($Users->id).'" >Update</a>';
16    })->addColumn('delete', function ($Users)
17    {
18        return $return = '<button data-id="'. encrypt($Users->id) .'" class="btn delete-user btn-danger">Delete</button>';
19    })->rawColumns(['update', 'delete'])->make(true);
20}